Toothbrush



FIG. 1 is a rear elevational view of a toothbrush showing my new design.

FIG. 2 is a right elevational view of FIG. 1, the left side elevational view being a mirror image thereof.

FIG. 3 is a front elevational view thereof.

FIG. 4 is a top plan view of FIG. 1.

FIG. 5 is a bottom plan view of FIG. 1. 

The ornamental design for a toothbrush, substantially as shown and described. 